Window-ventilator.



T. H. GARLAND. WINDOW VENTILATOR. APPLICATION FILED JULY 6, 190a.

Patented Nov. 17, 1908.

m entor 7fi07na; H. arland THOl'iAS H. GARLAND, OF CHICAGO, ILLINOIS.

WIND W-VENTILAT OR.

Specification of Letters Patent.

Patented Nov. 17, 1908.

Application filed July 6, 1908. Serial No. 442,079.

To all whom it may concern:

Be it known that I, THOMAS H. GARLAND, a citizen of the United States, residing at Chicago, in the county of Cool: and State of Illinois, have invented certain new and useful Improvements in Vindow- Ventilators, of which the following is a specification.

This invention relates to improvements in window ventilators, and refers more particularly to a window ventilator in which the passage of external currents through the ventilator in either direction produces an eductive action which withdraws air from the compartment being ventilated; the con struction and arrangement being such that the inducing drafts do not enter the compartment. 7

Among the salient objects of the invention are to provide a device by which a room or apartment may be effectively ventilated by withdrawing the vitiated or foul air without admitting into theroom external air through the ventilator; to provide a construction which isextremely simple and of low cost,

- and which can be adjusted either within the upper or lower part of the window and without in any wise mechanically changing the window construction; to provide an eflicient device devoid of moving parts; to provide a construction in which a comparatively slight external draft will induce an effective exhausting or eductive action through the ventilator; to provide a construction which is well designed to prevent the entrance of rain, snow, sleet, etc.; and in general to provide an improved device of the character referred to.

To the above ends the invention consists in the matters hereinafter described, and

more particularly pointed out in the ap- 1, provided centrally with a vertically disposed slot-like opening 2, upper and lower plates 3 and 4, respectively, a convex outer side wall, to which the outer edges of the upper and lower plates 3 and 4 conform and certain internal deflectors. The ends of the ventilator are open.

Describing the deflectors: Coincident with the side margins of theeduction opening 2 are arranged deflectors 6, (3, consisting of plates which extend fromtop to bottom of the ventilator and from the base plate of the latter laterally a distance preferably somewhat less than half the horizontal width of i the end openings. "Within each end of the ventilator is arranged another deflector, or partition plate, as 7, extending from top to bottom of the device and so arranged as to sub-divide the open ends of the ventilator; said deflectors being to this end preferably arranged to extend as to their main portions parallel with, or approximately parallel with, the base plate. The inner ends 8 of these deflectors are bent at right angles outwardly, oi' towards the convex side of the ventilator, so as to constitute deflector portions which direct the currents of air entering the outer half of each end of the Vontilator towards the convex or outer side of the latter. The deflectors 7 preferably extend from points coincident with the end margins of the ventilator inwardly to points approximately half, or a little more than half, the distance between the end of the ventilator and the corresponding deflector 6, so that passages 9 are formed between the edges of the deflectors 6 and the deflectors 7. Thus arranged the deflectors 6 act to deflect the currents of air entering the inner halves of the ventilator outwardly toward the convex side of the ventilator in substantially the same manner as do the deflectors 7, as before described. The result of this arrangement is that the air entering either end of the yentilator is divided into two currents by the straight or parallel portions of the deflectors 7, and both of the two currents deflect outwardly in such way as to create swirls or eddies in that ortion of the ventilator within and imme iately opposite the eduction opening 2; the air passing on out through the opposite end of the ventilator in flTY'Ob- 'vious manner. This abrupt outward deflection of the two volumes of air producg s a pronounced lnducnon effect through the outlet opening 2, due both to the molecular friction or aspiratingv eifect and tothe rare- .t'action incident to the flow ofthe currents of air in outwardly curved paths around the inner edges of the'deflectors 6 which define the eduction opening and the parts 8 which deflect the outer current.

I have found in practice that the device thus constructed is extremely eflectiv'e and produces an ample ventilation, even when there is but a slight breeze or movement of the external air. j V The ventilator is most advantageously mounted in proper relation in the window by mounting it upon a board or strip 10 of uniform width and cut to the proper length to occupy the full width of the window; the

sash being simply lowered or raised, as;the case maybe, the ventilator board inserted and the sash closed upon it so as to hold it in position. The base board 10 is, of course, provided with an opening 2 inregister with and the same size as the opening 2in'the bottom of the ventilator proper. "The board 10 may be of the same verticalwidth as the ventilator, or somewhat wider if preferred.

It will be understood from the foregoing description that the 'device fully accomplishes each of the severalobjects hereinbefore stated, and operates in accordance with the approved modern practice of ventilating compartments, cars, etc, by withdrawing the vitiated or foul air as distinguished from those devices which undertake to inject air from the outside. l

The two longitudinal halves of the ventilator are symmetrically constructed and arranged so that in which ever direction the current of air passes through the ventilator theeduction efi'ect is the same.

Of course the ventilator need not be applied to a window to be effective, but may be placed anywhere upon the outside wall of the compartment over any opening in the wall conununicating with the interior thereof and may ev.en be located at a distance from the wall it provided with a duct or conduit which communicates with the interrior of the room.

\Vhile a ventilator having but a single air passage and provided with but a single set of deflectors which produced the current flow and eddying effects opposite the eduction opening would be operative to some degree in educting air from the room, nevertheless the second or outer passage, by reason of the swirling motion of the air in that passage is cumulative. in effect, to the swirling.mo-. tionm the first passage, by increaslng the tendency to producea vacuum opposite the eduction opening in the base plate and thus increase the efiicieucy of the device.- The claims are therefore drawnto cover not only the plural passage form shown, but the de 'vice when organized with but a single passage. p

I claim as my invention:' 1. A ventilator comprising a casing open at both ends, provided at its base'side intermediate its'length with an eduction'opening, deflector parts arranged within the respec 70' tive ends of said casing to longitudinallydivide the, inlets thereof and other deflector part-s extending from, and at abrupt angles to, said first deflector parts and towards the T side of the casing remote from the base side, whereby the air currents passing through the deflector are vdeflectedabruptly away from the said eduction. opening and eddying current-s produced opposite the latter.

2. A ventilator comprising an open-endedcasing having a substantially flat-base side and provided in itssaid base side with an eduction opening, deflectors extending from the base inwardly at each side of said opening and forming an eduction passage debouching inthe central interior of the device, other deflectors arranged in the respec tive ends of the ventilator to longitudinallydivide the inlet portions thereof, said latter deflectors being provided at their inner ends with angular portions arranged to f deflect the air passing therethrough in the same direction as do the deflectors which. form said eduction passage." I

I 3. A ventilator comprisin an open-ended casing having a substantially flat base side A and a convex side opposed to said base and provided in its saidbase side with an'educ tion opening located approximately midlength thereof, deflectors extending from the base inwardly at each side of said 0 ening and forming an eduction passage de ouching in the central interior of the device, an' L-shaped deflector arranged in each end of the ventilator, one part of the deflector being arranged to longitudinally divide the inlet of theventilator and the other portion of the deflector being arranged to extend towards the convex side of the ventilator, and means for mounting said ventilator in a window opening.

4. A ventilator comprising an open-ended casing havinga substantially flat base side,

a convex side opposed to said base side and substantially flat top and bottom sides, said base side being provided with an eduction opening located midlength thereof, deflec-' tors extending from the base inwardly at each side of said 0 ening and forming an nally divide the inlet portions thereoi each of the latter deflectors being provided with an angular extension arranged to extend transversely and towards the convex side of the-device, and a window board or plate to which the base side of the ventilator is seeured, provided with an opening correspondl assage transversely and outwardly thereing to and re istering with the eduction I rom, the several passages being provided in opening in the hase of the ventilator. their base walls with openings which are op- 5. In a ventilator, an open-ended casing I posite or in register with each other and 5 provided in its base side with an eduction with the eduction opening or openings in the 15 opening, communicating with the interior of base side of the casing. the room to be ventilated, and having a plu- THOM S H. GARLAND. rality of longitudinal air passages,-each pas- Witnesses: sage being provided with deflector plates ar- PLINY B. SMITH,

l0 ranged to extend from the base wall of such D. J. NORMOYLE. 

